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PUMPS CM2-30 50HZ
The pump is a general-purpose machine with a wide range of applications. It is very important to correctly select the type and model of the pump. That's directly related to whether the pump can meet the system design requirements, the reliability and service life of the pump, etc. Many pumps are in abnormal operation due to unreasonable model selection, resulting in waste of energy, increased maintenance costs, etc. Therefore, the pump selection needs to be carried out carefully and with repeated comparison to ensure normal operation. The following are principles on selection and arrangement of pumps:
Product parameters
| 50Hz | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Model | Driving motor P2(KW) | Q (m3/h) | 1.0 | 1.5 | 2.0 | 2.5 | 3 | 3.5 |
| CM2-30 | CHLF2-30 | 0.37 | H (m) | 27 | 24 | 21 | 20 | 17 | 14 |
A pump is a general-purpose machine with a wide range of applications. It is very important to correctly select the type and model of the pump. This is directly related to whether the pump can meet the system design requirements, the reliability and service life of the pump, the purchase cost of the pump, and the total cost in the life cycle. In reality, due to unreasonable model selection, many pumps are in abnormal operation, resulting in waste of energy, increased maintenance costs, and even can not be used normally at all. Therefore, the pump selection needs to be carried out carefully, and the advantages and disadvantages of different schemes should be compared repeatedly to ensure the normal operation of the pump. The following are the principles of pump selection and arrangement of pumps:
Pump selection principle
Meet the requirements
The performance of the selected pump shall meet the requirements of process flow design.
Simplify pump selection
A pump with a simple structure is preferred. Because compared with the pump with a complex structure, the pump with a simple structure has high reliability.
It has the advantages of convenient maintenance and low total cost in the life cycle. For Example single-stage and multi-stage pumps, vane pumps, and reciprocating pumps.
Preferred centrifugal pump
Centrifugal pump has the characteristics of high speed, small volume, lightweight, simple structure, no pulsation in infusion, stable performance, easy operation, and maintenance. Therefore, centrifugal pumps should be selected as far as possible except for the following cases:
(1)When there are metering requirements, select the metering pump;
(2)Vortex pump and reciprocating pump shall be selected for small flow and high head;
(3)When the flow is small and the head is high, and the flow (pressure) is required to have no pulsation, the vortex pump is selected;
(4)Axial flow pump and mixed flow pump shall be selected for large flow and low head;
(5)When the medium air content is 75%, the flow is small and the viscosity is less than 37.4mm2/s, the vortex pump is selected;
(6)When the medium viscosity is large (greater than 650~1000mm2/s), rotor pump and reciprocating pump (gear pump and screw pump) shall be selected;
(7)For occasions with a frequent startup or inconvenient pump filling, select pumps with self-priming performance, such as self-priming centrifugal pumps, self-priming vortex pumps, and diaphragm pumps;
(8)When there is a special need, choose other pumps, such as jet pump, hose pump, etc.
Special requirements
For pumps installed in explosive areas or on special occasions, explosion-proof motors or other effective measures should be adopted according to the level of explosive areas.
Arrangement of pumps
Outdoor layout
Generally, the pumps are centrally arranged below or on the side of the pipe gallery, or near the suction equipment. The main advantages are good ventilation and convenient operation and repair. If the pump is arranged below the pipe rack, the center line of the pump outlet shall be aligned, 0.6m away from the center line of the pipe rack column.
Semi-open layout
The pump arranged in the semi-open air is suitable for rainy areas. Generally, the pump is arranged under the pipe gallery, and a ceiling is set on the upper part of the pipeline. Or arrange the pump on the lower floor of the frame, with the frame platform as the ceiling. According to the layout requirements of the pump, the pump shall be arranged into single row, double row, or multiple rows.
Indoor layout
The pumps arranged indoors are suitable for cold or windy areas and occasions with special process requirements.
Application field
① In the production of chemical and petroleum sectors, most of the raw materials, semi-finished products and finished products are liquids, and the production of semi-finished and finished raw materials into semi-finished products and finished products needs to go through complex technological processes. During these processes, pumps play a role in transporting liquids and providing pressure flow for chemical reactions. In addition, in many installations, pumps are used to adjust the temperature.
② In agricultural production, pumps are the main irrigation and drainage machinery. my country's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps.Pumps are also the most used equipment in the mining and metallurgical industries. The mine needs to be drained by pumps, and in the process of beneficiation, smelting and rolling, pumps are needed to supply water.
③ In the power sector, nuclear power plants need nuclear main pumps, secondary pumps, and tertiary pumps, and thermal power plants need a large number of boiler feed pumps, condensate pumps, oil and gas mixing pumps, circulating pumps, and ash pumps.
④ In national defense construction, the adjustment of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, and the ups and downs of submarines all require pumps. High pressure and radioactive liquid, and some also require the pump without any leakage.
⑤ In short, whether it is aircraft, rockets, tanks, submarines, drilling, mining, trains, ships, or everyday life, pumps are needed everywhere, and pumps are running everywhere. That's why the pump is listed as a general-purpose machine, which is a major product in the machinery industry.
⑥ Electric pumps, i.e. pumps driven by electricity. The electric pump is composed of a pump body, a water lift pipe, a pump base, a submersible motor (including cables) and a starting protection de
